CVE-2025-55660Public exploit

Process crash via malformed Opus packet length

Published Jun 15, 2026 · Updated Jun 15, 2026

Stack-based buffer overflow in GPAC MP4Box 2.4 allows attackers to crash the process by supplying a crafted MP4 file. In gf_opus_read_length, an invalid odd length in a non-self-delimited Opus packet causes a two-byte computed length to be written beyond the pckh stack object. Processing the file through the Opus inspection path requires user interaction and causes a segmentation fault or sanitizer abort, with no reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in GPAC MP4Box 2.4 allows attackers to crash the process by supplying a crafted MP4 file. In gf_opus_read_length, an invalid odd length in a non-self-delimited Opus packet causes a two-byte computed length to be written beyond the pckh stack object. Processing the file through the Opus inspection path requires user interaction and causes a segmentation fault or sanitizer abort, with no reported data disclosure or modification.

The record

CVE
CVE-2025-55660
Published
Jun 15, 2026
Updated
Jun 15, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3oss-sec disclosureCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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